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Number of n X 7 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with no occupancy greater than 2.
0

%I #5 Oct 02 2021 10:26:36

%S 239,388741,668597561,1170461488239,2055191230733819,

%T 3609497709468161601

%N Number of n X 7 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with no occupancy greater than 2.

%C Column 7 of A221303.

%e Some solutions for n=3

%e ..0..1..1..1..1..2..1....0..1..1..2..2..1..2....0..1..1..2..2..2..1

%e ..0..1..2..0..1..1..1....0..1..1..0..0..2..1....0..1..1..0..0..0..0

%e ..0..1..1..2..2..0..2....0..1..2..2..1..1..0....0..1..2..1..2..2..2

%Y Cf. A221303.

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 09 2013